Bug #27070 server logs are created unrequested and in wrong directory

mysql-test/t/log_state.test:
  Remove the "remove_file" for slow.log file, that file will now end up
  in var/log

mysql-test/t/log_state.test

@@ -136,4 +136,3 @@ disconnect con1;
 # Remove the log files that was created in the "default location"
 # i.e var/run
 --remove_file $MYSQLTEST_VARDIR/run/master.log
---remove_file $MYSQLTEST_VARDIR/run/master-slow.log